import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/user/Users.vue'
import Rights from '../components/power/Rights.vue'
import Roles from '../components/power/Roles.vue'
import GoodsCate from '../components/goods/GoodsCate.vue'
import Goods from '../components/goods/Goods.vue'
import Params from '../components/goods/CateParams.vue'
import Orders from '../components/orders/Orders.vue'
import Reports from '../components/reports/Reports.vue'

Vue.use(VueRouter)

// 创建路由规则
const routes = [
  { path: '/', redirect: '/login' },
  { path: '/login', component: Login },
  {
    path: '/home',
    component: Home,
    redirect: '/welcome',
    children: [
      { path: '/welcome', component: Welcome },
      { path: '/users', component: Users },
      { path: '/rights', component: Rights },
      { path: '/roles', component: Roles },
      { path: '/categories', component: GoodsCate },
      { path: '/goods', component: Goods },
      { path: '/params', component: Params },
      { path: '/orders', component: Orders },
      { path: '/reports', component: Reports }
    ]
  }
]

const router = new VueRouter({
  routes
})

// 挂载导航守卫
router.beforeEach((to, from, next) => {
  // 三个参数的含义，to表示要访问的页面，from表示当前页面，next表示放行函数
  // 访问的是登录页，直接放行
  if (to.path === 'login') return next()
  const tokenStr = window.sessionStorage.getItem('token')
  if (tokenStr === '') return next('/login')
  next()
})

export default router
